Investigation of Combustion of Emulated Biogas in a Gas Turbine Test Rig

作     者：Agustin VALERA-MEDINA Anthony GILES Daniel PUGH Steve MORRIS Marcel POHL Andreas ORTWEIN 

作者机构：Cardiff University Queen's Building Cardiff CF24 3AA United Kingdom DBFZ Deutsches Biomasseforschungszentrum gemeinnutzige GmbH Leipzig 04347 Germany Hochschule Merseburg Department Engineering and Natural Sciences Merseburg 06217 Germany 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2018年第27卷第4期

页      面：331-340页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the support from the Biofuels Research Infrastructure for Sharing Knowledge (BRISK) 7th Framework Programme to conduct this project (ref. CFU3-01-09-15) supported by funds of the Federal Ministry of Food and Agriculture (BMEL) based on a decision of the Parliament of the Federal Republic of Germany 

主　　题：燃烧能 汽轮机 煤气 钻塔 测试 二氧化碳 燃料气体 反应机制 

摘      要：Combustion of biogas in gas turbines is an interesting option for provision of renewable combined heat and power from biomass. Due to an increasing share of fluctuating renewable energies in the power grid(especially from wind and solar power), flexible power generation is of increasing importance. Additionally, with an increasing share of agricultural and municipal waste in biogas production, biogas composition is expected to be within a broader range. In this paper, the combustion of synthetic biogas(carbon dioxide and methane) in a combustion test rig with a swirl burner and a high pressure optical chamber is researched at different conditions. Results are compared to a CHEMKIN-PRO simulation using a detailed reaction mechanism. The results show that within the researched experimental matrix, stable biogas combustion for gas turbines can be achieved even with significantly changing gas composition and nominal power. Carbon dioxide concentration is varied from 0 to 60%. CO concentrations(normalized to 15% O_2) in the flue gas do not change significantly with increasing carbon dioxide in the fuel gas and, for the researched conditions, stayed below 10 ppm. NO_x concentration is below 10 ppm(normalized to 15% O_2) for pure methane, and is further decreasing with increasing carbon dioxide share in the fuel gas, which is mainly due to changing reaction paths as reaction analysis showed. Thermal load of the combustor is varied from 100% to 20% for the reference gas composition. With decreasing thermal load, normalized carbon monoxide flue gas concentration is further reduced, while NOx concentrations are remaining at a similar level around 5 ppm(normalized to 15% O_2).